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- Sun Mar 31, 2019 12:31 pm
- Forum: Help and Advice
- Topic: ST-2D upgrade to NCM300, now Zone 2 not working
- Replies: 1
- Views: 5054
ST-2D upgrade to NCM300, now Zone 2 not working
I recently swapped out my ST-2D for an NCM 300 in order to upgrade to an Ecobee4 Smart thermostat. My set up is: Oil-fired boiler with air handler and AC compressor outside. 2 zones, with Zone 1 controlling heat/cool/fan, and zone two a slave "temperature selection only" thermostat. I foll...